Feature flag driven development -
is the software development technique that is based on conditional branching of your code (e.g. if-else statements) to allow to separate deployment from release of new features in production. The code can be incrementally shipped behind a feature flag and be "invisible" to the end user thus allowing deployments to production even if the feature is incomplete. The visibility of the feature (or release of the feature) to the end user is controlled by the feature flag state that can be simply turned on like a switch and doesn't require a deployment.